I've been webmaster of a site for a few years that contains a large listing of holiday properties. Against my will the powers that be want to implement a white label product that would for many clients of the product produce a near identical copy of our main website.
Naturally alarm bells have been ringing for me and I'm concerned that these near identical copies of our site could seriously harm the main website.
Aside from "don't do it", are there any practical strategies that could be employed to avoid this issue ?
I've read others talking about changing the structure of pages and their layout but it sounds to me as if that could well not be enough to avoid google detecting duplicate content.